Radiation-dominated injection of positrons generated by the nonlinear Breit-Wheeler process into a plasma channel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00584067" target="_blank" >RIV/61389021:_____/23:00584067 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21340/23:00368889

Result on the web

<a href="https://pubs.aip.org/aip/pop/article/30/9/093107/2913099/Radiation-dominated-injection-of-positrons" target="_blank" >https://pubs.aip.org/aip/pop/article/30/9/093107/2913099/Radiation-dominated-injection-of-positrons</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0160121" target="_blank" >10.1063/5.0160121</a>

Result language

angličtina

Original language name

Radiation-dominated injection of positrons generated by the nonlinear Breit-Wheeler process into a plasma channel

Original language description

Plasma acceleration is considered a prospective technology for building a compact multi-TeV electron-positron collider in the future. The challenge of this endeavor is greater for positrons than for the electrons because usually the self-generated fields from laser-plasma interaction are not well-suited for positron focusing and on-axis guiding. In addition, an external positron source is required, while electrons are naturally available in the plasma. Here, we study electron-positron pair generation by an orthogonal collision of a multi-PW laser pulse and a GeV electron beam by the nonlinear Breit-Wheeler process. We studied conditions favorable for positron deflection in the direction of the laser pulse propagation, which favors injection into the plasma for further acceleration. We demonstrate using the OSIRIS particle-in-cell framework that the radiation reaction triggered by ultra-high laser intensity plays a crucial role in the positron injection. It provides a suppression of the initial transverse momentum gained by the positrons from the Breit-Wheeler process. For the parameters used in this work, the intensity of at least 2.2 × 10 23 W / cm 2 is needed in order to inject more than 1% of positrons created. Above this threshold, the percentage of injected positrons rapidly increases with intensity. Moreover, subsequent direct laser acceleration of positrons in a plasma channel, using the same laser pulse that created them, can ensure a boost of the final positron energy by a factor of two. The positron focusing and guiding on the axis is provided by significant electron beam loading that changes the internal structure of the channel fields.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/EF18_053%2F0016925" target="_blank" >EF18_053/0016925: IPP - Mobility II</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics of Plasmas

ISSN

1070-664X

e-ISSN

1089-7674

Volume of the periodical

30

Issue of the periodical within the volume

9

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

093107

UT code for WoS article

001080884400007

EID of the result in the Scopus database

2-s2.0-85173461707